Ypedal
100 TW
Ding Ding Ding.. Round 1 :
PSI -- LiFePo4 -- Testing.. 1 ... 2... Testing..
- Thread starter Ypedal
- Start date
Ypedal
100 TW
312 Watts
6.2 Amps
49.9 Volts
7.431 Ah
7.5ah used and holding 3.1 v +
8)
6.2 Amps
49.9 Volts
7.431 Ah
7.5ah used and holding 3.1 v +
8)
Sacman
10 kW
That's my cue....YOU DON'T NEED TO DODGE BULLETS... WHEN THE TIME COMES... YOU WON'T HAVE TO. 
dogman dan
1 PW
Green with envy
michaelplogue
10 kW
Just out of curiosity - why such a heavy guage wire for the charging/ballancing leads?
Ypedal
100 TW
lmao.. you guys crack me up.. 
I hate fragile stuff, like the whimpy needle pin connectors on RC stuff for example. The ballance leads are 20 awg on pack1 and 16 awg on pack 2,
Overbuilt ? oh yeah.. :wink: wait until you see what i have in mind for the pack assembly !
At this point in time, Gary and Fechter's BMS is still changing, i'm working on different charging solutions, etc, so with the heavy gauge ballance leads my options are open for fast charging !! And i won't have to rebuild the packs if the plan changes in the future !
I hate fragile stuff, like the whimpy needle pin connectors on RC stuff for example. The ballance leads are 20 awg on pack1 and 16 awg on pack 2,
Overbuilt ? oh yeah.. :wink: wait until you see what i have in mind for the pack assembly !
At this point in time, Gary and Fechter's BMS is still changing, i'm working on different charging solutions, etc, so with the heavy gauge ballance leads my options are open for fast charging !! And i won't have to rebuild the packs if the plan changes in the future !
johnrobholmes
10 MW
Really, the best way to charge would be a single cell charger for each and every one. But of course if the cells are manufactured with tight enough tolerances you won't have to balance them but once every ten charges or so.
Ypedal
100 TW
Round 2:
Ypedal
100 TW
10.5 amps with 10 x 200w lightbulbs !!!
Ypedal
100 TW
Sandy was sleeping on the job, loves that squirrel...
Ypedal
100 TW
10.1 Amp Hour !!!
Yeah, now that's the stuff, not even warm at 10 amps for 10ah... lovin it !
Yeah, now that's the stuff, not even warm at 10 amps for 10ah... lovin it !
Dee Jay
100 kW
- Joined
- Dec 11, 2007
- Messages
- 1,211
Ypedal said:
Wow, I never thought of trying fast-charging.. mostly because I thought it would stress the cells.
Is fast-charging as simple as using higher amp charger?
Is it: the higher C rating, the faster charging capability?
Nice battery pr0n Ypedal!
BTW, how fast are your single cell chargers?
J
You can fast charge these cells with a higher amp charger - but one that has a proper charging pattern and tweaked voltage like Soneil now makes. There is a unique charging algorithym that matches these cells which is recommended to keep them in balance.
Yes the "C" rate of these cells has something to do with being able to fast charge them.
Fast charging will likely reduce the overall life cycles, but these cells are extremely robust, and it won't make much difference for an e-bike application.
Don Harmon
Yes the "C" rate of these cells has something to do with being able to fast charge them.
Fast charging will likely reduce the overall life cycles, but these cells are extremely robust, and it won't make much difference for an e-bike application.
Don Harmon
miro13car
100 kW
Yedal,
capacity you got is consistent with my rides, I got even better result.
What is nice us that those cells really deliver real Ahs at 1C.
I rode 39km with frequent 15 min. stops /which allow batt to "recover"/ with multiple 40A something bursts/seconds/ and used up slightly more than 11Ah. but batt has time to recover.
What I said on another thread "4c rating" you cannot draw 50A from any 10Ah pack with "voltage unaffected".
So why would voltage of LifeBatt 10Ah pack be unaffected by 50 A draw, or is it voltage after pack rested enough time.
MC
capacity you got is consistent with my rides, I got even better result.
What is nice us that those cells really deliver real Ahs at 1C.
I rode 39km with frequent 15 min. stops /which allow batt to "recover"/ with multiple 40A something bursts/seconds/ and used up slightly more than 11Ah. but batt has time to recover.
What I said on another thread "4c rating" you cannot draw 50A from any 10Ah pack with "voltage unaffected".
So why would voltage of LifeBatt 10Ah pack be unaffected by 50 A draw, or is it voltage after pack rested enough time.
MC
Ypedal
100 TW
So it's been a while and time for an update.
Life is keeping me busy lately, but i really need to get these babies on the road .
I have 12 Soneil 24v 5 amp chargers on the way, i wanted the 10 amp units but they cost a frickin mint so the 5 amp boxes will have to do ( adding the 2 amps with the single cell chargers and it's still a fast charge !! )
Received my 6 x G10 Fiberglass sheets from Performance Hobbies, slight screwup with the customs declaration but the guy is responsive on email and i've worked it out.
I may not be building alot these last few days but i've been thinking alot ( not as expensive that way ) . I had my well disconected, and hooked up to city water very recently ( oh man.. my well water sucked, and city water out here is actually great ! a real shower now.. anyways.. )
While plugging the hole left behind from the water line in the foundation of the house, a light went off when i realized how cool this " Great Stuff " actually was !
Life is keeping me busy lately, but i really need to get these babies on the road .
I have 12 Soneil 24v 5 amp chargers on the way, i wanted the 10 amp units but they cost a frickin mint so the 5 amp boxes will have to do ( adding the 2 amps with the single cell chargers and it's still a fast charge !!
)Received my 6 x G10 Fiberglass sheets from Performance Hobbies, slight screwup with the customs declaration but the guy is responsive on email and i've worked it out.
I may not be building alot these last few days but i've been thinking alot ( not as expensive that way ) . I had my well disconected, and hooked up to city water very recently ( oh man.. my well water sucked, and city water out here is actually great ! a real shower now.. anyways.. )
While plugging the hole left behind from the water line in the foundation of the house, a light went off when i realized how cool this " Great Stuff " actually was !
Ypedal
100 TW
miro13car said:
The " Resting " effect you get with SLA is not exactly the same with lithium, voltage sag is a factor of internal resistance, depending on the State of Charge, letting off the throttle will allow the resting voltage to rise somewhat slowly, but the moment you re-apply load the voltage will drop quickly back to the point it was when you left off.. With Lithium, as long as you keep it to the rated capacity and don't allow any cell to go below 2.1v under load it's all good. Don't tempt fate by draining your pack to see if you can do it for kicks... make it last and keep the charge state as high as possible for as long as you have it.
With Lead, you get into 6ah of a 12ah cell and if you don't let up the voltage keeps dropping and if you let if rest it will rise again and you can squeze a bit more capacity that kills cycle life.
Ypedal
100 TW
Trying different materials to see what sticks and what peels away clean..
If you mix it at various points in the setting stage you can make denser foam or fluffier stuff..
If you mix it at various points in the setting stage you can make denser foam or fluffier stuff..
Ypedal said:a light went off when i realized how cool this " Great Stuff " actually was !
Haha! :lol: Most of my garage is held together/weather-proofed with "Great Stuff"... 'course I've been told it's an "uninsurable" garage, but what do I care as long as it doesn't collapse. Yeah man... you're on the right track for sure! :wink:
dogman dan
1 PW
Laquer thinner is about the only think besides gasoline I found that can get the great stuff off your hands. Gojo, or other orange hand cleaners sorta work. Nothing gets it off once it gets hard though.
Another great stuff I like is the gutter sealing caulk. Like for raingutters. It makes a great glue for sticking together things that are too slippery or have too much expansion contraction motion for epoxy. It's the only thing I ever found that could repair a polyethylene windsurfboard. Much better than any grade of silicone for sticking where a leak is intolerable. Again the proof of it is you can't get it off your hands at all. Good stuff to seal the seams of a battery box or such.
Another great stuff I like is the gutter sealing caulk. Like for raingutters. It makes a great glue for sticking together things that are too slippery or have too much expansion contraction motion for epoxy. It's the only thing I ever found that could repair a polyethylene windsurfboard. Much better than any grade of silicone for sticking where a leak is intolerable. Again the proof of it is you can't get it off your hands at all. Good stuff to seal the seams of a battery box or such.
miro13car
100 kW
Back to the topic,
PSI cells like all Lithium will last longer with shallow discharges.
I anly once discharged my 36V10Ah LifeBatt to over 10Ah.
Just to see if I can get 10Ah at all.
Using controller NORMAL mode on Canadian Tidial Force bike will guarantee controller will NOT demand more than 10A from battery and that's what I was using whan I saw 9Ah used up on my WattsUp.
So depends what you draw - if you draw 60A most of the time and approach 10Ah you better be careful.
Becauase of course high currents will cause unbalanced cells much quicker.
I know what you say. I know it is dangerous game, without LVC any cell in the pack can reach 2.1V any moment.
LifeBatts have warning buzzer for approching critical low voltage at cell level and I was listening for sound but never came and I stopped there not taking more chances.
MC
PSI cells like all Lithium will last longer with shallow discharges.
I anly once discharged my 36V10Ah LifeBatt to over 10Ah.
Just to see if I can get 10Ah at all.
Using controller NORMAL mode on Canadian Tidial Force bike will guarantee controller will NOT demand more than 10A from battery and that's what I was using whan I saw 9Ah used up on my WattsUp.
So depends what you draw - if you draw 60A most of the time and approach 10Ah you better be careful.
Becauase of course high currents will cause unbalanced cells much quicker.
I know what you say. I know it is dangerous game, without LVC any cell in the pack can reach 2.1V any moment.
LifeBatts have warning buzzer for approching critical low voltage at cell level and I was listening for sound but never came and I stopped there not taking more chances.
MC
miro13car
100 kW
you see LVC uses MOSFET and it better be really good one , becauase it introduces resistance to the current path.
Normaly on my 8km commute every working day I use maximum 2.5 - 2.8AH, no more.
I charge at work.
LVC?
MC
Normaly on my 8km commute every working day I use maximum 2.5 - 2.8AH, no more.
I charge at work.
LVC?
MC
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